//引入mongoose模块
const mongoose = require('mongoose');

//连接数据库    账号:密码@
mongoose.connect('mongodb://bbf:bbf@localhost:27017/select', { useNewUrlParser: true, useUnifiedTopology: true })
    .then(() => { console.log('数据库连接成功') })
    .catch(() => { console.log('数据库连接失败') });

//导出模块
module.exports = mongoose;